Expandable and contractible garden hose

ABSTRACT

A hose which automatically expands longitudinally and automatically expands laterally upon the application of a pressurized liquid is disclosed. The hose can automatically expand longitudinally up to six times its unexpanded or contracted length. Upon release of the pressurized liquid within the hose, the hose will automatically contract to a contracted condition. The hose includes an inner tube made from an elastic material and an outer tube made from a non-elastic material. The inner tube is positioned concentrically within the outer tube in both a contracted condition and an expanded condition. The outer tube is secured to the inner tube only at a first end of the inner and outer tubes and at a second end of the inner and outer tubes. The outer tube moves laterally and longitudinally with respect to the inner tube when the tubes are transitioning between a contracted condition and an expanded condition.

PRIORITY

In accordance with 37 C.F.R. 1.76, a claim of priority is including inan Application Data Sheet filed concurrently herewith. Accordingly, thepresent invention claims priority as a continuation of U.S. patentapplication Ser. No. 15/440,841 entitled “Garden Hose Device and Method”filed Feb. 23, 2017 which claims priority as a divisional of U.S. patentapplication Ser. No. 15/055,095 entitled “Commercial Hose” filed Feb.26, 2016 and issued on Feb. 28, 2017 as U.S. Pat. No. 9,581,272 whichclaims priority as a continuation of U.S. patent application Ser. No.14/301,825 entitled “Commercial Hose” filed Jun. 11, 2014 and issued onMar. 8, 2016 as U.S. Pat. No. 9,279,525, which is a continuation of U.S.patent application Ser. No. 13/859,511, entitled “Commercial Hose”,filed Apr. 9, 2013, and issued Jun. 24, 2014 as U.S. Pat. No. 8,757,213,which is a continuation-in-part of U.S. patent application Ser. No.13/690,670, entitled “Expandable Garden Hose”, filed Nov. 30, 2012, andissued on Jul. 9, 2013 at U.S. Pat. No. 8,479,776, which is acontinuation-in-part of U.S. patent application Ser. No. 13/654,832,entitled “Expandable Hose Assembly Coupling Member”, filed Oct. 18,2012, and now abandoned, which is a continuation-in-part of U.S. patentapplication Ser. No. 13/488,515, entitled “Expandable Hose Assembly”,filed Jun. 5, 2012, and issued Oct. 23, 2012 as U.S. Pat. No. 8,291,942,which is a continuation-in-part of U.S. patent application Ser. No.13/289,447, entitled “Expandable and Contractible Hose”, filed Nov. 4,2011, and issued Oct. 23, 2012 as U.S. Pat. No. 8,291,941; the contentsof the above referenced patents are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to a hose for carrying liquid materials.In particular, a hose that automatically contracts to a contracted statewhen there is no pressurized liquid within the hose and expands to anextended state when a pressurized liquid is introduced into the hose. Inthe contracted state the hose is relatively easy to store and easy tohandle because of its relative short length and its relative lightweight and in the extended state the hose can be located to where everthe liquid is required. The hose is comprised of an elastic inner tubeand a separate and distinct non-elastic outer tube positioned around thecircumference of the inner tube and attached and connected to the innertube only at both ends and is separated, unattached unbonded andunconnected from the inner tube along the entire length of the hosebetween the first end and the second end.

BACKGROUND OF THE INVENTION

Hoses which are used to carry various liquids are known in the art. Oneof the problems encountered with these hoses is storage of the hose whenit is not being used to transport the liquids. While current hoses areflexible and can be wrapped around a cylinder or drum for storage andtransport, the length and width of the hose cannot be reduced. Anotherproblem encountered with wrapped or coiled hoses is that they tend tokink when unwrapped or uncoiled. This problem is usually encountered bythe average homeowner when using a garden hose to water their grass,plants, or wash their vehicles.

Firefighters have a solution to the kinking problem. The hoses that theyuse collapse into a relatively flat state when the liquids are removedfrom the hoses. The hoses are then stored in layers which are formed bythe hose being laid back and forth upon itself. When the firefightersuse the hoses stored like this, they only have to pull at one end of thehose and it unfolds in a straight line without kinking. This is not apractical solution to a homeowner's problem of hose storage becausegardens hoses are relatively small in diameter, compared to fire hoses,and almost all garden hoses do not collapse into a flat condition whenthe water is emptied from the hose.

Another problem with hoses known in the art is that they are heavy bulkyand difficult to unravel when lying on the ground and also difficult tohandle and drag around to the place where the liquid is needed both whenthey are filled with a liquid and equally as difficult to handle anddrag around when they are empty and needing to be returned to thereoriginal place of storage. Also, if the user does not have a device forwinding the hose then he must try to place the hose on the ground in away as to not entangle the hose within itself because if the hose doesbecome entangled within itself this makes it difficult and frustratingto unravel the hose the next time the hose is used.

Therefore, what is needed in the art is a hose that can be expanded andextended to a practical length during use, and automatically returned tothe reduced length when not in use. Also, a hose which is relativelylight in weight and will not kink when taken from storage and filledwith liquid for use.

DESCRIPTION OF THE PRIOR ART

R. H. Vansickle et al., U.S. Pat. No. 3,481,368 discloses a flexiblehose comprising an elastomer liner tube surrounded by a plurality oflayers of metallic wire reinforcement and an external cover, the innerreinforcing 15 layer comprising a single thickness of helically woundwires interlaced by textile yarns with the wires lying in a smoothcylindrical configuration and all interlacing crimp being in the textileyarns. One or more additional reinforcing layers of wire are woundhelically without 20 interlacing textile yarns and with an insulatinglayer of elastomer between each layer of reinforcement. A layer ofbraided wire may be provided over the other reinforcing layers andbeneath the cover.

J. C. Hamrick, U.S. Pat. No. 3,520,725 discloses a vacuum cleaningsystem in which a pliable but flexurally rigid vacuum hose normallystored within a suction conduit has little or no stretchability when thehose is being moved to extended or retracted stored condition in theconduit to facilitate movement of the hose through bends in the conduit,and wherein a piston on the hose 20 is deformable so as to be moved pastan abutment carried by an outlet receptacle on the outer end of theconduit, and wherein interengagement between the piston and the abutmentotherwise limits extension or retraction of the hose, as the case maybe, relative to the conduit.

Buhrmann et al., U.S. Pat. No. 3,682,202 discloses an improvedcollapse-resistant, reinforced hose of flexible polymeric materialincluding a semi-rigid generally circumferentially disposed supportingstructure which includes preferably a single layer of textile fabricreinforcement, the major portion of which is composed of treatedpolyester or nylon fibers. The polyester or nylon fibers are treatedwith an organic polyisocyanate and preferably a solution of at least 2percent organic polyisocyanate in a non-reactive solvent. The hose hassubstantially improved bursting strength and resistance to vacuumcollapse without the need of additional support, such as a metal wireinsert. The invention is particularly useful for flexible radiator hosesused in automotive vehicle cooling systems.

Sullivan, U.S. Pat. No. 4,009,734 discloses a flexible self-retractingcoiled tubing having desirable recoil strength and elastic memory isdescribed. The coiled tubing is adaptable especially as aself-retracting air tube for transmitting fluids under pressure topneumatic equipment. The coiled tubing comprises an extruded seamlessplastic tube prepared by extruding a mixture comprising a chemicallyextended polyester and from about 10% to about 50% of a polybutyleneterephthalate polymer.

Logan, U.S. Pat. No. 4,091,063 discloses a molded hose construction andmethod of making same is provided wherein such hose construction hasaxially spaced convolutions and a controlled flexibility defined byalternating crests and troughs, and the hose construction has anelastomeric inner layer, an elastomeric outer layer, and an intermediatereinforcing layer made of a fabric material having a substantial openspace between cooperating threads defining the fabric material; and thelayers are bonded as a unitary structure by strike-through columns ofelastomeric material extending through said substantial space with thealternating crests and troughs having a controlled wall thicknessthroughout which assures the controlled flexibility, and the crests andtroughs having been formed with the elastomeric layers in a semi-curedcondition to assure said controlled wall thickness thereof.

Home, U.S. Pat. No. 4,276,908 discloses a thermoplastic hose isdisclosed in which a reinforcement layer is made from a combination ofyarns and monofilaments to provide stereo interstices where mechanicalbonds between the reinforcement and its adjacent element of the hose canbe established.

Piccoli et al., U.S. Pat. No. 4,553,568 discloses a flexible hoseadapted to regain its original shape after crushing due to a novelbraided-spiral reinforcement layer containing one braid member which isa relatively stiff, uncrimped monofilament and a second braid memberwhich is a flexible textile material crimped around the stiffmonofilament at each contact point in the braided spiral layer. Thebraided spiral imparts improved crush and kink resistance to the hosestructure. This hose is particularly useful as a gasoline pumpdispensing hose which is subject to frequent crushing by vehicle wheelsduring service.

Champleboux, U.S. Pat. No. 4,895,185 discloses a device with flexiblehose, particularly for an expandable packer, wherein hose is reinforcedby armature layers made of flexible cables disposed helically and isattached at least at one end by compression of said layers against rigidpieces, characterized by the supporting elements and gripping elements,which are coaxial, having non-adhesive conical compression surfaceswhich diverge toward the end and by at least one wedge provided withslits being driven between reinforcing layers to ensure compression.

Walton et al., U.S. Pat. No. 4,989,643 discloses a high performancecomposite hose having enhanced durability, reliability and longevity foruse in high pressure, high temperature and/or vibrational environmentssuch as turbocharged truck, bus, automobile, marine and generatingengines. The composite hose comprises one or more plies of balancedfabric having a high performance elastomer adhered to the inner andouter surfaces of each fabric ply.

Mercer, U.S. Pat. No. 5,023,959 discloses a system for extending andretracting the waste hose for a waste disposal system that is typicallyfound on recreational vehicles and includes power or crank-driven hoseextender means for extending the collapsible hose from its collapsedmode stored on-board the recreational vehicle, to its extendedconfiguration which it is used for dumping waste from an RV holding tankinto an inlet of an RV waste dump station.

Whaley, U.S. Pat. No. 5,036,890 discloses a device which may be insertedinto the hydrant end of a conventional garden or water hose for thepurpose of reinforcing that portion of the hose which is apt to bekinked or broken due to short bending of the hose at the hydrant end bytension imposed on the hose during use. The reinforcement devicecomprises a length of coiled resilient material having a resilientgasket mounted on one end thereof which may be inserted or removed froma hose at will.

LoJacono, Jr. et al., U.S. Pat. No. 5,246,254 discloses an anti-kinkingdevice used in conjunction with a garden variety water hose, wherein thedevice includes a housing defined by a tubular body having a couplingmember rotatably mounted to the tubular body so as to be connected to awater faucet, wherein the opposite end of the tubular body is threadedso as to connect to a garden-type hose, and further includes anelongated flexible nylon cable that is fixedly secured to a boss memberformed in the internal wall of the tubular body, whereby the cable isformed with a length so as to be readily positioned within the fulllength of the hose.

Igarashi U.S. Pat. No. 5,264,262 discloses a refrigerant transportinghose having a laminar structure including an inner tube consisting of atleast one layer, an outer tube disposed radially outwardly of andcoaxially with the inner tube, and a reinforcing fiber layer interposedbetween the inner and outer tubes. The inner tube includes a resin layerformed of a resin composition.

Mezzalira, U.S. Pat. No. 5,477,888 discloses a hose (10) which comprisesat least one tubular layer (3) of plastic or rubber material, amesh-network (4) of the chain type presenting mesh lines (5) and meshrows (6) having a tubular shape being wound on the external surface ofsaid inner layer, a possible external layer (7), and is characterized inthat said mesh rows are slanted in relation to the longitudinal axis ofthe hose. According to a preferred embodiment the lines (5) of saidmeshes are slanted in relation to the longitudinal axis Y of the hose,following a direction opposite to the direction of the mesh rows (6).

Kanao, U.S. Pat. No. 5,555,915 discloses a cleaner hose includes a hosebody, connection cylinders to be connected to a cleaner operating pipeand a cleaner body, respectively, which are connected to ends of thehose body, respectively, and a reinforcement wire material wound in thehose body spirally and continuously over the whole length of hose body.The reinforcement wire material is shaped like a steeply slanted spiralin a predetermined length portion near one of or both of the ends of thehose body so that adjacent spiral portions of the reinforcement wirematerial are close to each other while a hose wall of the hose body isloosened toward the inner circumferential surface. On the other hand,the reinforcement wire material is shaped like a gently slanted spiralin an intermediate portion except the one of or both of the ends of thehose body so that adjacent spiral portions of the reinforcement wirematerial are separated from each other in the direction of a pipe axis.

Grieve et al., U.S. Pat. No. 5,607,107 discloses a retractable conduitformed from a sheet of memory-set polyester. To manufacture thememory-set strip, the polyester sheet is wound into a desired coiledposition. It is then heated and cooled in a manner to memory-set thesheet in a coiled form. After this process the sheet of polyester willautomatically return to the coiled condition after it has been uncoiled.In one form, suitable as a splash block, the distal end of the polyestersheet is wider than the end attachable to a downspout. In another formthe polyester sheet is sheathed in an elongated polyethylene tube, toform a retractable hose. In a preferred form, the distal end of the hoseis supported on a spool which will roll along the ground as the hose iswound and unwound to further ensure that the hose retracts properly. Thetube can also be provided with holes to act as a sprinkler if desired.

Carter, U.S. Pat. No. 5,816,622 discloses a protective sleeve for agarden hose includes a protective shell section having a generallytubular body with an inner bore shaped for receiving a coupling of thegarden hose snugly therein. A flexible strain relief section isreleasably attached to the shell section wherein the flexible strainrelief section has a generally tubular body. A locking member of thestrain relief section releasably attaches the strain relief section tothe shell section. The locking member is receivable within an openingformed in the body of the shell section. The locking member isresiliently movable from a relaxed condition in which it extends throughthe opening and engages the body of the shell section for preventingaxial movement of the strain relief section away from the shell section,to an inwardly flexed position in which the locking member flexesinwardly out of the opening and disengages the body of the shell sectionfor allowing relative axial movement between the shell and strain reliefsections. The strain relief section has an outer surface that defines agripping surface for facilitating the attachment of the garden hose withanother garden hose.

Horst et al., U.S. Pat. No. 5,894,866 discloses a garden hose assemblyis provided and comprises holding means comprising at least a portion ofsuch hose assembly with the holding means and portion being adapted tobe coiled around an associated support for holding the portion at adesired position to enable use of the hose assembly in a hands-freemanner.

Fujimoto, U.S. Pat. No. 6,024,132 discloses a flexible hose comprises abellows hose wall 1 composed of an inner wall 2 and an outer wall 3 eachmade of a soft resin and a spiral hard reinforcement 4 interposed therebetween. As the hose contracts, a spiral groove 7 is formed inside ofthe hose. The inner wall 2 is not partially bonded or fused with theouter wall 3 and the hard spiral reinforcement 4 to form unbonded sitesor fragments 8. As the hose contracts, the unbonded fragments 8 areseparated from the outer wall 3 and the spiral hard enforcement 4 andmove to the inward direction of the hose, and close the spiral groove 7.Therefore, even a fluid flows to any longitudinal direction, theflexible hose reduces a flow resistance.

Akedo et al., U.S. Pat. No. 6,024,134 discloses a laminated tapecomprising a main layer of a polyester-series thermoplastic polyurethaneresin and a covering layer formed of a soft vinyl chloride resin fusedwith at least one surface of the main layer is spirally wound, and itsadjacent side edges are bonded each other to form a hose wall.

Wells et al., U.S. Pat. No. 6,098,666 discloses a tubing assembly forconveying fluid under pressure such as from a source of air pressure ina vehicle to an airbrake system of the vehicle. The assembly includes aflexible first and second tubing member, each having an outer surfaceand extending axially from a forward distal end to a rearward distalend.

Ericksen, U.S. Pat. No. 6,568,610 discloses a flexible water spray wandfor connection to a standard garden hose, having a housing connectableat a lower end to the garden hose and at an upper end to a flexible tubeassembly connected at an opposite end to a spray nozzle. The pistol griphousing includes a water flow control valve such as a trigger mechanismoperatively connected to a water valve for controlling the flow of waterfrom the nozzle of the wand.

Ragner et al., U.S. Pat. No. 6,948,527 discloses a linearlyself-actuated hose for use in transporting fluids (liquids, gases, solidparticles, and combinations of these three). Hoses (30) and (30b) have abiasing spring (36) extends along the full length, and can comprisesingle or multiple springs and/or multiple diameter spring coils. Spring(36) is covered with hose cover material (32) on the outside and hosecover material (34) on the inside to form a sealed hose and are bowedinward or outward radially between the individual spring coils dependingon the intended use of hose (30) or (30b), respectfully to give thecover materials room to move out of the way when the hose retracts andthe coils of spring (36) are forced close together.

Weyker, U.S. Pat. No. 6,955,189 discloses a garden hose assemblyincludes an elongated and flexible tubular member that includes an openfirst end, an open second end and a peripheral wall extending betweenthe first and second open ends. A cross-section taken traversely to alongitudinal axis of the tubular member has a generally oblong shapewhen the tubular member is filled with a fluid and a substantiallyflattened shape when the tubular member is not filled with a fluid. Thetubular member has an outer surface colored a fluorescent color. Athreaded female coupler is fluidly coupled to the first end and athreaded male coupler is fluidly coupled to the second end.

Ragner, U.S. Pat. No. 7,549,448 discloses a linearly self-actuated hosefor use in transporting fluids (liquids, gases, solid particles, andcombinations of these three). Hose (30) has a biasing spring (36) thatextends along its full length, and can comprise single or multiplesprings and/or multiple diameter spring coils. Spring (36) is coveredwith hose cover material (32) on the outside and hose cover material(34) on the inside to form a sealed hose and are bowed inward or outwardradially between the individual spring coils depending on the intendeduse of hose (30) to give the cover materials room to move out of the waywhen the hose retracts and the coils of spring (36) are forced closetogether.

Ragner et al., U.S. Pat. No. 8,776,836 discloses a hose (70) having abiasing spring (76) along the full length. Spring (76) is covered withthe hose cover material (72) on the outside and hose support layer (74)and hose sealing layer (72) on the inside to form a sealed hose. Theinvention comprises the improvement of the hose body (layers (72), (74),and (75)) by defining the layers as bowed inwardly radially between theindividual spring coils to create a helical indentation (74b) aroundhose (70). This helical indentation (74b) causes the hose body materials(layers (72), (74), and (75)) move inward radially when hose (70) isretracted and the coils of spring (76) are forced close togetherlongitudinally. Thus, layers (72), (74), and (75) are foldedsubstantially with spring (76) when retracted, greatly reducing thevolume of the hose (70) in its retracted position and substantiallyprotecting (72), (74) and (75) from damage by abrasion and puncture.

SUMMARY OF THE INVENTION

A hose which automatically expands longitudinally and automaticallyexpands laterally upon the application of a pressurized liquid withinthe hose is disclosed. The hose can expand longitudinally up to sixtimes its unexpanded or contracted length and can expand laterally up tosix times its unexpanded width. Upon release of the pressurized liquidwithin the hose, the hose will automatically contract to a contractedcondition. The hose includes an expandable inner tube made from anelastic material and a separate, distinct outer tube made from anon-elastic material, positioned around the outer circumference andlength of the inner tube and secured to the inner tube only at the firstand second end. The outer tube is unattached, unconnected, unbonded, andunsecured to the inner tube along the entire length of the inner tube,between the first end and the second end, so that the outer tube canmove freely with respect to the inner tube along the entire length ofthe inner tube between the first end and the second end.

Accordingly, it is an objective of the present invention to provide ahose that expands longitudinally and expands laterally upon theapplication of a pressurized liquid within the hose.

It is a further objective of the present invention to provide a hosethat automatically contracts upon release of a pressurized liquid withinthe hose. The contracted length being up to six times shorter that anexpanded length.

It is yet another objective of the present invention to provide a hosethat is relatively light compared to a non-expanding/non-contractinghose.

It is a still further objective of the present invention to provide ahose that will not kink or become entangled upon itself when in use.

It is a still further objective of the present invention to provide ahose including indicia, such as words, on an outer tube or sleeve.

It is a still further objective of the present invention to provide ahose that can be readily coupled and uncoupled to a source of water suchas a faucet on a house.

Other objects and advantages of this invention will become apparent fromthe following description taken in conjunction with any accompanyingdrawings wherein are set forth, by way of illustration and example,certain embodiments of this invention. Any drawings contained hereinconstitute a part of this specification and include exemplaryembodiments of the present invention and illustrate various objects andfeatures thereof.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal side view of the present invention in acontracted position;

FIG. 2 is a cross section view of the present invention taken along line2-2 in FIG. 1;

FIG. 3 is a longitudinal view of the present invention in an expandedposition;

FIG. 4 is a cross sectional view of the present invention taken alongline 4-4 in FIG. 3;

FIG. 5 is a cross sectional view, perspective view of a section of thehose of the present invention taken along line 4-4 in FIG. 3;

FIG. 6 is a cross sectional view, perspective view of a section of thehose of the present invention taken along line 2-2 in FIG. 1;

FIG. 7 is a perspective view of a male coupler secured to an end of thehose of the present invention when the hose is in its extendedcondition; and

FIG. 8 is a perspective view of a female coupler secured to an end ofthe hose of the present invention when the hose is in its contractedcondition.

DETAILED DESCRIPTION OF THE INVENTION

While the present invention is susceptible of embodiment in variousforms, there is shown in the drawings and will hereinafter be describeda presently preferred, albeit not limiting, embodiment with theunderstanding that the present disclosure is to be considered anexemplification of the present invention and is not intended to limitthe invention to the specific embodiments illustrated.

FIGS. 1-8, which are now referenced, illustrate the present inventionand the manner in which it is assembled. FIGS. 1 and 3 illustrate apreferred embodiment of the expandable and contractible hose of thepresent invention. The hose is self-expanding upon application of apressurized liquid and increased fluid volume within the hose. The hoseis also self-contracting upon release of the pressurized liquid andfluid volume from within the hose. The hose 10 is composed of twoseparate and distinct tubes 12 and 14. The inner tube 14 is formed froma material that is elastic with an elongation ratio of up to 6 to 1 andcan expand up to 4 to 6 times its relaxed or unexpanded length when apressurized liquid is introduced into the elastic inner tube 14. Apreferred material for the inner tube 14 is natural latex rubber.However, other synthetic materials, which have elastic propertiessimilar to natural latex rubber, specifically, the ability toautomatically retract from a stretched or expanded state, can also beused. Upon application of pressurized liquid into the inner tube, theelastic inner tube 14 expands radially outwardly or laterally, withrespect to its length, within the outer tube. The radial expansion ofthe inner tube 14 is constrained by the maximum diameter of thenon-elastic outer tube 12. The outer tube 12 is formed from anon-elastic, relatively soft, bendable, tubular webbing material. Thepreferred materials used to form the non-elastic outer tube 12 arebraided or woven nylon, polyester, or polypropylene. Other braided orwoven materials can also be employed to form the outer tube 12. Therequirements of the outer tube 12 material are that it be soft,bendable, non-elastic, and strong enough to withstand internal pressuresof up to 250 pounds per square inch, (psi).

The hose 10 includes a female coupler 18 at a first end thereof and amale coupler 16 at a second end thereof. The male coupler 16 includes athreaded portion 20, a mid-portion 22, and a portion 24 onto which aresecured the inner tube 14, the outer tube 12, and an expansionrestrictor sleeve 26. The inner tube 14, the outer tube 12, and theexpansion restrictor sleeve 26 are secure to the male coupler as will bedescribed herein after.

The female coupler 18 includes a threaded portion 28 on the interior ofthe female coupler, FIGS. 1, 3, and 8. The threaded portion 28 isconstructed to receive the male threads 20 and enable coupling of onehose to another. The threaded portion 28 is also constructed to coupleto a faucet or a water outlet on the exterior or interior of a house orresidence. Most water faucets on homes or residences are provided with astandard size male coupler or fitting. Most conventional garden hoses orother hoses are provided with a standard size female coupler or fittingwhich will engage and couple the hose 10 to the faucet or water outlet.The inner tube 14, the outer tube 12, and the expansion restrictorsleeve 27 are secure to the female coupler 18 as will be describedherein after. In the preferred embodiment the female coupler 18 alsoincludes a washer 29 which helps to provide a fluid tight connectionbetween the male and female couplers or any other male or femalecoupler.

During assembly, the non-elastic outer tube 12 is attached and connectedto the inner tube 14 only at the first end and second end by the malecoupler 16 and the female coupler 18, The outer tube 12 is unattached,unconnected, unbonded, and unsecured to the elastic inner tube 14 alongthe entire length of the inner tube 14, between the two couplers, andthus the outer tube 12 is able to move freely with respect to the innertube along the entire length of the inner tube 14, between the couplers,when the hose expands or contracts.

The hose 10 of the present invention is illustrated in its contractedcondition in FIGS. 1, 2, 6, and 8. In this condition, the elastic innertube 14 is in a relaxed contracted condition wherein there are no forcesbeing applied to the inner tube 14 to expand or stretch it. Also, itshould be noted that the outer tube 12 will not be in contact with theinner tube 14 when the hose is in this contracted condition. There willbe a space 15 between the inner tube 14 and the outer tube 12 (FIG. 6).As illustrated in FIG. 6, the thickness of the wall of the inner tube14, in the contracted position, is relatively large compared to thethickness of the inner tube 14, in the expanded position, FIG. 5. Theexpansion of the elastic inner tube 14 laterally, is the result of anincrease in the pressure and volume of the liquid within the inner tube14. This increase in pressurized liquid and volume in the inner tube 14also results in the expansion of the length of the elastic inner tube14. The expansion of the inner tube 14, both laterally andlongitudinally, results in a decrease in the wall thickness of the innertube, an increase in the diameter of the inner tube thus increasing thevolume of liquid that can flow through the inner tube 14. This decreasein wall thickness is clearly illustrated in FIG. 5, wherein the insidediameter of the inner tube has been expanded and extended because of anincrease of the pressurized liquid and volume within the inner tube 14.

The outer tube 12 is preferably constructed of a non-elastic, softtubular webbing. The webbing is made from a strong braided or wovennylon, polyester, or polypropylene fabric or any other tubular braidedof woven, non-elastic fabric which can withstand an internal pressure ofup to 250 psi. In the expanded or extended condition of the hose 10 ofthe present invention, FIGS. 3-5, the inner tube 14 is expanded orstretched. In this expanded condition the non-elastic outer tube 12constrains the lateral expansion of inner tube 14, as illustrated inFIGS. 3 and 5. The outer tube 12 is also taunt, smooth, and relativelyflat along its length in this extended condition, note FIGS. 3 and 5.Since the outer tube 12 is non-elastic, the length and width of theouter tube 12 determines the length and width of the hose 10 in itsexpanded condition. Thus, the diameter and length of the outer tube 12determines the diameter and length of the hose of the present inventionupon the application of pressurized liquid to the interior of theelastic inner tube 14. This diameter and length of the non-elastic outertube is the final diameter and the final length of the hose 10 when itis in its expanded condition and in use to transport or deliver aliquid, such as water.

In a preferred embodiment of the present invention the hose 10 expandsup to 4 to 6 times its contracted length during operation. Thus, aten-foot hose in a contracted condition would expand up to 40 to 60 feetwhen liquid under pressure is supplied to the interior of the inner tube14 of the hose. The pressure within the hose is accomplished byintroducing liquid under pressure into one end of the hose andrestricting the flow of the liquid out of the other end of the hose,resulting in the liquid filing up and expanding the inner tube 14.

For example, when the hose 10 of the present invention is utilized as agarden hose around a house, coupler 18 is secured to a faucet or wateroutlet on an exterior wall of the house. The faucet is turned on oropened so that water under pressure can now enter the hose 10. Arelatively normal pressure for water within a house is 60 psi. However,the pressure of water within a hose can vary widely, depending on anumber of circumstances, such as, the pressure of water supplied by awater utility, the pressure of water supplied by a pump and sustained byan air bladder, when water is supplied from a well, etc. A nozzle orother distributor can be secured to male coupler 16 at the opposite endof hose. The nozzle can be a conventional nozzle which varies the rateand spray pattern of water exiting from the nozzle. Many nozzles areL-shaped so as to be able to be comfortably gripped and used by anindividual. These nozzles also have a pivoting on-off handle whichoperates an internal valve. This internal valve permits, limits, andstops the flow of water through the nozzle, to generate a build-up ofliquid within the hose body between the two couplers.

The nozzle provides various amounts of restriction to the liquid exitingat the end of the hose depending on how large the opening in the nozzleis. The smaller the opening in the nozzle, the more the nozzle restrictsthe release of liquid at the end of the hose, and the higher thepressure and volume of liquid inside the hose. The larger the opening inthe nozzle, the less the nozzle restricts the release of liquid at theend of the hose, and the lower the pressure and volume of liquid insidethe hose. The pressure coming from a typical house is approximately 60psi. If the flow of liquid at the other end of the present invention wastotally restricted, the psi inside the inner tube would be the same asthe pressure coming from the house, 60 psi. At this high pressure, theinner tube 14 and the outer tube 12 in the present invention wouldexpand to its maximum length of fifty feet. As the liquid at the end ofthe hose is released, the pressure becomes reduced inside the hose andthe hose contracts slightly based on the decrease in internal pressure,but the hose remains fully expanded in its operational state,distributing water through its sprayer. The present invention will fullyexpand even when the pressure provided into the female end is below thetypical pressure of 60 psi coming from a house.

In one example, the water pressure coming from the house was 60 psi andthe water pressure at the nozzle on the other end of the hose was 35psi, from the fluid dynamics of water flowing through an open butpartially restricted hose. Even with this pressure drop along the lengthof the hose 10 from 60 psi to 35 psi, the pressure is enough to causethe inner tube 14 to expand laterally and longitudinally until itslateral and longitudinal expansion became constrained by the non-elasticouter tube 12 and expanded to the maximum length and width of thenon-elastic outer tube 12. In a preferred embodiment, the hose 10expands from ten feet in length in its contracted condition to fiftyfeet in length in its expanded condition.

FIGS. 7 and 8 illustrate how male and female couplers 16 and 18respectively are secured to the hose of a preferred embodiment of thepresent invention. In FIG. 7 the male coupler 16 includes a plurality ofthreads 20. The male coupler 16 also includes a tubular extension 32which extends into the interiors of the inner tube 14, the outer tube 12and the expansion restrictor sleeve 26. The tubular extension 32 has ahollow interior 34 through which fluids can flow. A securing device 34encompasses the outer sleeve 26, the outer tube 12, and the inner tube14 and secures these elements to the tubular extension 34. A separateflow restrictor 37 is illustrated within coupler 16. Other types of flowrestrictors, such as hose nozzles, sprayers, etc. can also be employed.Anything that controls the release of the liquid exiting the hose can beemployed. As can be seen in FIG. 7, the outer tube 12 is relativelysmooth, the inner tube wall is relatively thin, compared to its thickercontracted condition and the expansion restrictor sleeve 26 isrestricting the expansion of the inner and outer tubes at the junctionof the securing device 34. Without the sleeve 26, the inner tube wouldimmediately expand outwardly in a step function and probably rupture.The sleeve 26 permits the inner tube 14 to gradually expand and taperoutwardly, thus preventing rupturing of the inner tube at this junction.Other types of connections, such as clamping and swaging can also beemployed to secure the male coupler to the inner tube 14, the outer tube12, and the sleeve 26. By using other types of connections, an expansionrestrictor sleeve may not be needed.

FIG. 8 illustrates the female coupler 18 secured to the hose of thepresent invention. The hose in FIG. 8 is in the contracted condition.The female coupler 18 is provided with a plurality of internal threads28. The threads 28 are designed to interact and cooperate withcomplementary threads 20 on a male coupler to provide a fluid tightconnection between the male and female couplers 16 and 18. The femalecoupler 18 also includes a tubular extension 36 which extends into theinteriors of the inner tube 14, the outer tube 12 and the expansionrestrictor sleeve 27. The tubular extension 36 has a hollow interior 38through which fluids can flow. A securing device 40 encompasses theouter sleeve 27, the outer tube 12, and the inner tube 14 and securesthese elements to the tubular extension 36. As can be seen in FIG. 8,the soft fabric outer tube 12 is not smooth, but folded, compressed andgathered around the circumference of the inner tube 14, the inner tube14 wall is relatively thick, compared to its extended condition and thesleeve 27 is not restricting expansion of the inner and outer tubes atthe junction of the securing device 40. Without the sleeve 27, the innertube 14 would immediately expand outwardly in a step function andprobably rupture upon the application of pressurized liquid to theinterior of hose 10. The sleeve 27 permits the inner tube 14 togradually expand and taper outwardly, thus preventing rupturing of theinner tube at this junction. Other types of connections, such asclamping and swaging can also be employed to secure the female couplerto the inner tube 14, the outer tube 12, and the sleeve 27. By usingother types of connections, an expansion restrictor sleeve may not beneeded.

Another feature of the present invention is the savings in weight of thehose. The hose 10 in its contracted condition is relatively light andafter it is expanded up to 4 to 6 times, the weight of the hose does notincrease. Also, because the hose does not contain any metal componentssuch as springs, wire mesh or other metal parts along the entire lengthof the hose between the male connector and the female connector aten-foot contracted hose may only weigh less than 2 pounds and in theexpanded condition, (not counting the weight of the liquid inside theexpanded hose) the fifty-foot hose would also only weigh less than 2pounds. In contrast however, a conventional rubber ½ inch ID 50-foothose could weigh up to 12 pounds. This savings in weight enables thehose of the present invention to be easily carried, easily dragged,easily handled and easily used by anyone who uses the hose butespecially by individuals who do not posses exceptional strength or donot want to drag, carry or lug around heavy, bulky, conventional rubberhoses.

Another feature of the present invention is that the outer tube 12 isreduced or decreased in length when there is no pressure within innertube 14. With no pressure or volume in the elastic inner tube 14 theinner tube automatically contracts. The condition of the outer tube 12when the inner tube 14 is in the contracted condition is illustrated inFIGS. 1, 2 and 6. Because the outer tube is unconnected, unattached,unsecured, or unbonded to the inner tube along the entire length of thehose between the first end and the second end, the soft fabric materialof the outer tube 12 can move freely with respect to the inner tube. Thefact that the outer tube 12 can move freely with respect to the innertube 14 along the entire length of the hose 10 enables the outer tube 12to become folded, compressed and gathered around the outside of thecircumference of the inner tube 14 along its length in the contractedcondition when there is not pressurized liquid within the inner tube 14.The flexibility of the outer tube 12 to become folded, compressed andgathered condition of the outer tube 12 helps prevent the hose 10 fromkinking and also helps prevent it from becoming entangled upon itself.Thus, an empty hose 10 in the contracted condition is easily storedwithout worry of the hose kinking or becoming entangled, as mostconventional hoses do, because the elastic inner tube and the outer tubeare very flexible. This tendency of the hose 10 to not become kinked orentangled enables a user to store the hose 10 in a very small space withno worry of having to untangle or unkink the hose when it is removedfrom storage and used. A user of the present invention can take hose 10from a stored condition, secure a nozzle or other flow restrictor on oneend of the hose, secure the hose 10 to a water faucet and turn on thewater without the fear of the hose becoming entangled or kinked orwithout the need to untangle or unkink the hose.

After they are used conventional garden hoses are normally carried ordragged back to their place of storage and they are stored on a reel orcoiled up upon themselves and laid on a flat surface. This requires timeto carry and drag the hose and to properly store the hose and alsorequires an expense to purchase the hose reel. The hose 10 of thepresent invention automatically and quickly contracts to its originalplace of storage and can then be easily folded up, rolled up, or coiledup and stored in any container, even very small containers, or on anysurface, thus saving time and expense for the owner of the hose.

FIGS. 5 and 6 illustrate a preferred embodiment of the presentinvention. During the assembly of the hose in the preferred embodiment aten-foot elastic inner tube 14 in its relaxed or contracted condition isinserted into the hollow interior of a 50-foot non-elastic outer tube12. The ten-foot inner tube 14 and the 50-foot outer tube 12 and theexpansion restrictor sleeve 27 are then all attached and securedtogether on a coupler at the first end. The ten-foot inner tube is thenstretched or expanded through the hollow interior of the outer tube 12until the elastic inner tube 14 is expanded to 5 times its relaxed orcontracted length. At this point in the assembly process the expandedelastic inner tube 14 and the non-elastic outer tube 12 are both clampeddown and the inner tube 14 and the outer tube 12 are both 50 feet long.The inner tube 14, and the outer tube 12 and the expansion restrictorsleeve 27 are then attached and secured together to the coupler at thesecond end while the hose is still in the expanded condition. Aspreviously stated, the elastic inner tube 14 and the non-elastic outertube 12 are only attached and secured together at the first end and thesecond end. The inner tube 14 and the outer tube 12 are unattached,unbonded, unconnected and unsecured along the entire length of the hosebetween the first end and the second end so as to allow the inner andouter tubes to move relative to each other between the couplers. Thisallows the non-elastic outer tube 12 to move freely with respect to theinner tube 14 along the entire length of the hose between the couplerson the first end and the second end.

When the clamp is removed at the second end from the expanded 50-footelastic inner tube 14 and the 50 foot non-elastic outer tube 12, theexpanded elastic inner tube 14 automatically contracts within itselfback to its original relaxed length of ten feet. The length of the50-foot non-elastic outer tube 12 is also reduced to only ten feet inthe contracted condition because when the stretched and extended elasticinner tube 14 contracts from its expanded length, the unattached,unbonded, unconnected and unsecured soft fabric non-elastic outer tube12 is contracted by the couplers pulling together, as this happens, theouter fabric also catches on the rubbery elastic inner tube 14 materialcausing the outer tube 12 to become folded, compressed and gatheredrelatively evenly around the outside circumference along the entirelength of the contracted inner tube 14, as opposed to bunching only atthe far end of the inner tube 14. Thus, because the 50-foot non-elasticouter tube 12 has many folds that are compressed and gathered around the10-foot contracted and relaxed inner tube 14, the folded, compressed andgathered 50-foot outer tube 12 measures the same 10-foot length as the10-foot contracted inner tube 12.

When a pressurized liquid is introduced into the elastic inner tube 14in the contracted and relaxed condition, the elastic inner tube 14begins to expand laterally and longitudinally and the outer tube 12begins to unfold and uncompresses around the circumference of theelastic inner tube 14. Consequently, when the inner tube 14 expands toits maximum length of 50 feet, the outer tube 12 unfolds, anduncompresses along the entire length of the inner tube 14 until itreaches the same 50-foot length as the inner tube 14 in the expandedcondition. Also, because the inner tube 14 expands both longitudinallyand laterally and its expansion is constrained by the non-elastic outertube 12, the inner tube 14 fills all the available space inside thenon-elastic outer tube 12 and thus the surface of the unfolded,uncompressed outer tube 12 becomes smooth in the expanded condition asdepicted in FIG. 5.

The hose in FIG. 5 is shown in its expanded condition after a liquidunder pressure has been introduced into the hose and the pressure andvolume of the liquid has increased inside the inner tube 14. Theexpanded length of the hose 10 is now 50 feet, 600 inches, or 15.24meters. The volume of fluid within the hose 10 is 0.943 gallons, 120ounces, 3.569 liters, or 3180.64 cubic centimeters. The outercircumference of the hose 10 is 2.12 inches or 5.39 centimeters. Thediameter of the outer tube 12 is 0.68 inches or 1.73 centimeters. Thediameter of the inner tube 14 is 0.64 inches or 1.63 centimeters. Thethickness of the wall of the inner tube 14 is 0.031 inches or 0.079centimeters. The thickness of the outer tube 12 is 0.031 inches or 0.079centimeters. The thickness of the outer tube 12 remains the same in boththe expanded and contracted conditions. The material from which theinner tube 14 is formed can be any color. The hose in FIG. 6 is in itscontracted condition and its dimensions are as follows. The length ofthe hose is 10 feet, 3.33 yards, or 3.05 meters. The volume of liquidwithin the hose 10 is 0.025 gallons, 3.2 ounces, 0.094 liters, or 94.635cubic centimeters. The outer circumference of the hose 10 is 2 inches or5.08 centimeters. The diameter of the outer tube 12 is 0.4 inches or1.02 centimeters. The inside diameter (ID) of the inner tube 14 is, 0.25inches or 0.635 centimeters. The outside diameter (OD) of the inner tube14 is 0.375. The thickness of the wall of the inner tube 14 is 0.125inches or 0.317 centimeters. The thickness of the outer tube 12 is 0.031inches or 0.079 centimeters.

The outer tube 12 is relatively smooth in the expanded condition, asseen in FIGS. 3 and 5. This smooth surface enables the hose 10 to beused and manipulated with relative ease. In addition, the expandedelastic inner tube 14 and the smooth surface of the outer tube 12prevents the hose from kinking. Also, the smooth surface enables indiciato be placed on the outer surface. An example of this indicia isillustrated in FIG. 5, the words “Magic Hose”. All types of indicia canbe placed on the exterior of the outer tube 12, such as letters,numbers, patterns, designs, and/or pictures. Any type of indicia thatcan be affixed to the outer tube 12 can be used. The indicia can be anycolor also including black or white. The material from which the outertube 12 is formed can also be any color.

The preferred embodiment of the present invention utilizes water to filland expand the hose 10. However, other liquids can also be employed withthe present invention, so long as the liquids are not corrosive to theinner tube 14. The temperatures of the liquids employed in the presentinvention are lower than temperatures which will alter the physical andchemical properties of the materials used in the hose of the presentinvention. Also, because the inner tube 14 is elastic it can expand ifthe water within the tube freezes. For example, if a garden hose of thepresent invention were left outside in the winter, the water containedtherein would freeze. Normal garden hoses would split, but the presentinvention would expand when the water turns to ice because the innertube is elastic.

All patents and publications mentioned in this specification areindicative of the levels of those skilled in the art to which theinvention pertains. All patents and publications are herein incorporatedby reference to the same extent as if each individual publication wasspecifically and individually indicated to be incorporated by reference.

It is to be understood that while a certain form of the invention isillustrated, it is not to be limited to the specific form or arrangementherein described and shown. It will be apparent to those skilled in theart that various changes may be made without departing from the scope ofthe invention and the invention is not to be considered limited to whatis shown and described in the specification and any drawings/figuresincluded herein.

One skilled in the art will readily appreciate that the presentinvention is well adapted to carry out the objectives and obtain theends and advantages mentioned, as well as those inherent therein. Theembodiments, methods, procedures and techniques described herein arepresently representative of the preferred embodiments, are intended tobe exemplary and are not intended as limitations on the scope. Changestherein and other uses will occur to those skilled in the art which areencompassed within the spirit of the invention and are defined by thescope of the appended claims. Although the invention has been describedin connection with specific preferred embodiments, it should beunderstood that the invention as claimed should not be unduly limited tosuch specific embodiments. Indeed, various modifications of thedescribed modes for carrying out the invention which are obvious tothose skilled in the art are intended to be within the scope of thefollowing claims.

What is claimed is:
 1. A hose comprising: a flexible elongated outertube constructed from a fabric material having a first end and a secondend, an interior of said outer tube being substantially hollow, saidflexible elongated outer tube having a maximal length and a maximaldiameter; a flexible elongated inner tube having a first end and asecond end, an interior of said inner tube being substantially hollow,said inner tube being formed of an elastic material, said elastic innertube having a relaxed length when said inner tube is not beingstretched, said inner tube relaxed length being substantially less thansaid outer tube maximal length; a first coupler secured to said firstend of said inner and said outer tubes, said first coupler constructedto couple said hose to a source of pressurized liquid; a second couplersecured to said second end of said inner and said outer tubes, saidinner and outer tubes unsecured between said first and second ends sothat said outer tube is not held in frictional contact with said innertube so that said outer tube can move freely along said inner tube; anda flow restrictor coupled to said second coupler, whereby uponintroduction of a flow of pressurized liquid through said first couplerinto said inner tube and operation of said flow restrictor to at leastpartially block said flow of pressurized liquid from exiting said innertube, said inner tube fills with pressurized liquid resulting in anincrease in fluid pressure within said inner tube interior, saidincrease in fluid pressure expands said inner tube longitudinally alonga length of said inner tube and laterally across a width of said innertube thereby increasing said hose to an expanded condition, and wherebystopping said flow of pressurized liquid into said first coupler andreleasing said pressurized liquid out of said second coupler results insaid hose contracting to a decreased length as a result of the automaticcontraction of the elastic inner tube.
 2. The hose of claim 1 whereinsaid outer tube is made from a material which will not stretchlongitudinally or laterally when a force is applied to an interior ofsaid outer tube.
 3. The hose of claim 2 wherein said outer tube is madefrom a material selected from the group consisting of nylon, polyester,or polypropylene.
 4. The hose of claim 1 wherein said inner tube is madefrom an elastic material with an elongation ratio of up to six to oneand which can expand up to six times its contracted or unexpandedlength.
 5. The hose of claim 1 including a first restrictor sleevesecured to said first end of said inner and said outer tubes, and asecond restrictor sleeve secured to said second end of said inner andsaid outer tubes, whereby said first and second restrictor sleevesprovide a gradual transition of the laterally outward expansion of saidinner tube when there is an increase in pressurized liquid within saidinner tube interior between said first coupler and said second coupler.6. The hose of claim 1 wherein said inner tube and said outer tube aremade from flexible materials which will not kink or become entangledupon itself when said inner and said outer tubes are in their expandedcondition.
 7. The hose of claim 5 including a first securing devicesecuring said first restrictor sleeve, said outer tube, and said innertube to said first coupler, and a second securing device securing saidanother expansion restrictor sleeve, said outer tube and said inner tubeto said second coupler.
 8. The hose of claim 1 including indicia on saidouter tube.
 9. The hose of claim 8 wherein said indicia is recognizablewhen said hose is in said extended condition and said indicia is notrecognizable when said hose is in said retracted condition.
 10. The hoseof claim 1 wherein said flow restrictor is integrally formed with saidsecond coupler.
 11. The hose of claim 1 wherein said flow restrictor isa nozzle which is removeably secured to said hose.
 12. The hose of claim7 wherein said first and second securing devices extend around an outercircumference of said hose.
 13. The hose of claim 1 wherein said hose isa garden hose.
 14. The hose of claim 1 wherein said hose is a fire hoseused by firefighters.
 15. The hose of claim 1 wherein said inner tubeand said outer tube are made from flexible materials which will not kinkwhen said inner and said outer tubes are in their contracted condition.16. A method of transporting a liquid comprising: forming an expandinghose, said expanding hose including a non-elastic, bendable elongatedouter tube having a first end and a second end, an interior of saidouter tube being substantially hollow, said expanding hose including anexpandable, elastic elongated inner tube having a first end and a secondend, an interior of said inner tube being substantially hollow, saidelastic inner tube positioned within said substantially hollow outertube; securing a first coupler to said first end of said inner and saidouter tubes; securing a second coupler to said second end of said innerand said outer tubes, said inner and said outer tubes being secured toeach other only at said first and said second ends and unsecured to eachother between said first and said second ends; connecting said firstcoupler to a source of pressurized fluid; connecting said second couplerto a fluid flow restrictor; introducing a flow of pressurized liquidinto said expanding hose through said first coupler; restricting saidflow of pressurized liquid exiting the expanding hose, resulting in anincrease in fluid pressure within said expanding hose between said firstand second couplers causing said inner tube to expand longitudinallyalong a length of said inner tube and laterally across a width of saidinner tube thereby increasing a length and width of said hose to anextended condition; and automatically contracting said expanding hose toa decreased length and width by removing said flow of pressurized liquidinto said expanding hose and removing the increase in fluid pressurewithin said expanding hose between said first coupler and said secondcoupler, whereby said inner tube moves freely with respect to said outertube when there is no fluid pressure differential between said firstcoupler and said second coupler.
 17. The method of transporting a fluidof claim 16 wherein said elastic inner tube is elongated up to six timesits contracted or unexpanded length.
 18. The method of transporting afluid of claim 16 including securing a first expansion restrictor sleeveto said first end of said inner and said outer tubes; securing a secondexpansion restrictor sleeve to said second end of said inner and saidouter tubes; whereby when said increase in fluid pressure expands saidinner tube, said first and second expansion restrictor sleeves restrainthe expansion of said inner and said outer tubes and prevent said innertube from increasing in diameter as a step function.
 19. The method oftransporting a fluid of claim 16 including providing indicia on saidouter tube and expanding said outer tube longitudinally along a lengthof said outer tube until said indicia is recognizable.
 20. The method oftransporting a fluid of claim 16 wherein said outer tube constrains thelateral or radial expansion and the longitudinal expansion of said innertube upon an increase of said fluid pressure between said first couplerand said second coupler within said hose.